Catalyst retaining structure capable of preventing catalyst leakage
By plugging the plug into the heat exchange tube and setting up a multi-layer sealing structure, the problem of catalyst leakage is solved, the sealing effect is improved, and the sealing ability is achieved.
Patent Information
- Application Number
- CN202421724529.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-22
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-07-22
AI Technical Summary
In the prior art, catalysts are prone to leak from the gap between the wire mesh and the tube plate sealing surface, resulting in poor sealing effect.
The plug is plugged into the free end of the heat exchange tube. The plug is equipped with a step portion and a wire mesh. One side of the wire mesh is abutting the step portion and the other side is abutting the pressure plate. A sealing ring is provided between the plug and the heat exchange tube. A gasket is provided between the plug and the end surface of the pipe plate and the heat exchange tube. It is connected to the pipe plate through the grille pressure plate to form a multi-layer sealing structure.
Effectively prevent catalyst leakage, improve sealing effect, eliminate gaps caused by installation unevenness and other reasons, and achieve higher sealing.
Smart Images
Figure CN223166004U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of heat exchangers, in particular to a catalyst holding structure capable of preventing catalyst leakage.
Background Art
[0002] A heat exchanger is a device that transfers part of the heat of a hot fluid to a cold fluid, also known as a heat exchanger. Heat exchangers play an important role in many industrial productions such as chemical industry, petroleum, power, food and others. In chemical production, heat exchangers can be used as heaters, coolers, condensers, evaporators, reboilers, etc. A shell-and-tube heat exchanger mainly consists of a shell, a tube bundle, a tube sheet, a head, etc. The shell is mostly circular, and parallel tube bundles or spiral tubes are installed inside. The two ends of the tube bundle are fixed on the tube sheet. For the two fluids exchanging heat in the shell-and-tube heat exchanger, one flows inside the tubes, and its path is called the tube side; the other flows outside the tubes, and its path is called the shell side. The wall surface of the tube bundle is the heat transfer surface.
[0003] Please refer to Figure 1 and Figure 2 As shown, it discloses a catalyst holding structure in the prior art, which includes a tube sheet 1` and several heat exchange tubes 2`. The free ends of the heat exchange tubes 2` are welded in the heat exchange tube holes of the tube sheet 1`. A layer of wire mesh 3` is laid below the tube sheet 1`. A grid pressing plate 4` is arranged below the wire mesh 3`. The grid pressing plate 4` is connected to the tube sheet 1` through several fixing members 5`. Catalyst 6` is arranged inside the heat exchange tubes 2`. The defect of this kind of catalyst holding structure is that: in the actual production process, we find that the gap between the wire mesh and the sealing surface of the tube sheet is difficult to control. Therefore, during use, the catalyst in the heat exchange tubes often leaks from the gap between the wire mesh and the sealing surface of the tube sheet.
[0004] Therefore, it is necessary to provide a catalyst holding structure capable of preventing catalyst leakage to solve the above technical problems.
Content of the Utility Model
[0005] To solve the above problems, the purpose of the utility model is to provide a catalyst holding structure capable of preventing catalyst leakage.
[0006] To achieve the above object, the technical solution adopted by the present utility model is as follows: A catalyst holding structure capable of preventing catalyst leakage, comprising: a tube sheet and a plurality of heat exchange tubes. The tube sheet is provided with a plurality of heat exchange tube holes, and the free ends of the heat exchange tubes are welded in the heat exchange tube holes of the tube sheet. A plug is inserted into the free end of each heat exchange tube. The plug includes a head that abuts against the end faces of the tube sheet and the heat exchange tube and a plug-in portion that is inserted into the heat exchange tube. The interior of the plug is hollow, and the inner wall of the plug is provided with a stepped portion. A wire mesh is provided at the stepped portion. One side of the wire mesh abuts against the stepped portion, and the other side of the wire mesh abuts against a pressing plate. The pressing plate is welded to the inner wall of the head of the plug. A sealing ring is provided between the plug-in portion of the plug and the heat exchange tube. A washer is provided between the head of the plug and the end faces of the tube sheet and the heat exchange tube. A grid pressing plate is provided outside the plurality of plugs. The grid pressing plate is connected to the tube sheet through a plurality of fixing members.
[0007] Preferably, a catalyst holding structure capable of preventing catalyst leakage in the present utility model is further provided as: The sealing ring is an O-ring.
[0008] Preferably, a catalyst holding structure capable of preventing catalyst leakage in the present utility model is further provided as: The wire mesh is a wedge-shaped wire mesh.
[0009] Preferably, a catalyst holding structure capable of preventing catalyst leakage in the present utility model is further provided as: The fixing members are studs and nuts.
[0010] Preferably, a catalyst holding structure capable of preventing catalyst leakage in the present utility model is further provided as: The washer is a flat washer.
[0011] Preferably, a catalyst holding structure capable of preventing catalyst leakage in the present utility model is further provided as: The heat exchange tube is filled with a catalyst.
[0012] Preferably, a catalyst holding structure capable of preventing catalyst leakage in the present utility model is further provided as: The material of the wire mesh is stainless steel.
[0013] Preferably, a catalyst holding structure capable of preventing catalyst leakage in the present utility model is further provided as: The material of the plug is stainless steel.
[0014] Compared with the prior art, the utility model has the following beneficial effects: Compared with the catalyst holding structure in the prior art where a whole wire mesh is laid, after improvement, the utility model arranges the wire mesh in a single plug, and then inserts the plug installed with the wire mesh into the heat exchange tube, thereby realizing the sealing of the catalyst inside the heat exchange tube, and solving the technical problem of catalyst leakage from the gap between the wire mesh and the tube sheet sealing surface in the prior art. In addition, the utility model forms a first seal between the plug and the heat exchange tube by setting a sealing ring, and realizes a second seal between the head of the plug and the end faces of the tube sheet and the heat exchange tube by providing a washer between them. The setting of the two seals greatly improves the sealing effect, and the setting of the washer can eliminate the gap between the plug and the tube sheet and the heat exchange tube caused by installation, unevenness, etc.
Description of the Drawings
[0015] Figure 1 It is a schematic structural view of a catalyst holding structure in the prior art.
[0016] Figure 2 is Figure 1 a partial enlarged view of part A in
[0017] Figure 3 It is a schematic structural view of a catalyst holding structure in the utility model.
[0018] Figure 4 is Figure 3 a partial enlarged view of part B in
[0019] Figure 1 and Figure 2 in: 1`, tube sheet; 2`, heat exchange tube; 3`, wire mesh; 4`, grid pressing plate; 5`, fixing part; 6`, catalyst.
[0020] Figure 3 and Figure 4 in: 1, tube sheet; 2, heat exchange tube; 3, catalyst; 4, plug; 40, head; 41, inserted part; 42, stepped part; 43, wire mesh; 44, pressing plate; 5, sealing ring; 6, washer; 7, grid pressing plate; 8, fixing part.
Detailed Embodiments
[0021] The following further describes in detail a catalyst holding structure capable of preventing catalyst leakage according to the utility model through specific embodiments.
[0022] Refer Figures 3 to 4As shown in the figure, a catalyst holding structure capable of preventing catalyst leakage includes a tube sheet 1 and a plurality of heat exchange tubes 2. The tube sheet 1 is provided with a plurality of heat exchange tube holes, and the free ends of the heat exchange tubes 2 are welded into the heat exchange tube holes of the tube sheet 1. The heat exchange tubes 2 are filled with a catalyst 3. A plug 4 is inserted into the free end of each heat exchange tube 2. The plug 4 includes a head 40 that abuts against the end faces of the tube sheet 1 and the heat exchange tube 2 and a plugging portion 41 that is inserted into the heat exchange tube 2. The interior of the plug 4 is hollow, and a stepped portion 42 is provided on the inner wall of the plug 4. A wire mesh 43 is provided at the stepped portion 42. In this embodiment, the wire mesh 43 is a wedge-shaped wire mesh, which facilitates installation.
[0023] One side of the wire mesh 43 abuts against the stepped portion 42, and the other side of the wire mesh 43 abuts against a pressing plate 44. The pressing plate 44 is welded to the inner wall of the head 40 of the plug 4. A sealing ring 5 is provided between the plugging portion 41 of the plug 4 and the heat exchange tube 2. In this embodiment, the sealing ring 5 is an O-ring. A washer 6 is provided between the head 40 of the plug 4 and the end faces of the tube sheet 1 and the heat exchange tube 2. By providing the sealing ring 5, a first seal is formed between the plug 4 and the heat exchange tube 2. By providing a washer 6 between the head 40 of the plug 4 and the end faces of the tube sheet 1 and the heat exchange tube 2, a second seal is achieved between the plug 4 and the tube sheet 1 and the heat exchange tube 2. The setting of the two seals greatly improves the sealing effect. In this embodiment, the washer 6 is a flat washer, and the setting of the flat washer can eliminate the gaps between the plug 4 and the tube sheet 1 and the heat exchange tube 2 caused by installation, unevenness, etc. A grid pressing plate 7 is provided outside the plurality of plugs 4. The grid pressing plate 7 is connected to the tube sheet 1 through a plurality of fixing members 8. In this embodiment, the fixing members 8 are studs and nuts. The wire mesh 43 and the plug 4 are both made of stainless steel, so they have good corrosion resistance.
[0024] In summary, compared with the catalyst holding structure in the prior art that lays a whole wire mesh, in the improved version of the present invention, the wire mesh 43 is provided in a single plug 4, and then the plug 4 installed with the wire mesh 43 is inserted into the heat exchange tube 2, thereby realizing the plugging of the catalyst inside the heat exchange tube, and further solving the technical problem of catalyst leakage from the gap between the wire mesh and the sealing surface of the tube sheet in the prior art.
[0025] The above embodiments only illustrate the principles and effects of the present invention creatively and some applied embodiments, rather than being used to limit the present invention. It should be noted that for those of ordinary skill in the art, without departing from the creative concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention.
Claims
1. A catalyst holding structure capable of preventing catalyst leakage, comprising: A tube sheet and a plurality of heat exchange tubes. The tube sheet is provided with a plurality of heat exchange tube holes, and the free ends of the heat exchange tubes are welded in the heat exchange tube holes of the tube sheet. It is characterized in that: a plug is inserted into the free end of each heat exchange tube. The plug includes a head that abuts against the end faces of the tube sheet and the heat exchange tube and a plug-in part that is inserted into the heat exchange tube. The inside of the plug is hollow. A stepped portion is provided on the inner wall of the plug, and a wire mesh is provided at the stepped portion. One side of the wire mesh abuts against the stepped portion, and the other side of the wire mesh abuts against a pressing plate. The pressing plate is welded to the inner wall of the head of the plug. A sealing ring is provided between the plug-in part of the plug and the heat exchange tube. A washer is provided between the head of the plug and the end faces of the tube sheet and the heat exchange tube. A grid pressing plate is provided outside a plurality of plugs, and the grid pressing plate is connected to the tube sheet through a plurality of fixing members.
2. The catalyst retention structure capable of preventing catalyst leakage according to claim 1, characterized in that: The sealing ring is an O-ring.
3. A catalyst holding structure capable of preventing catalyst leakage according to claim 1, characterized in that: The wire mesh is a wedge-shaped wire mesh.
4. A catalyst holding structure capable of preventing catalyst leakage according to claim 1, characterized in that: The fixing members are studs and nuts.
5. A catalyst holding structure capable of preventing catalyst leakage according to claim 1, characterized in that: The washer is a flat washer.
6. A catalyst holding structure capable of preventing catalyst leakage according to claim 1, characterized in that: The heat exchange tube is filled with a catalyst.
7. The catalyst holding structure capable of preventing catalyst leakage according to claim 1, wherein: The material of the wire mesh is stainless steel.
8. A catalyst holding structure capable of preventing catalyst leakage according to claim 1, characterized in that: The material of the plug is stainless steel.